| MasterOnion vs King | 10–14 | 41.67% |
| MasterOnion vs Reina | 17–4 | 80.95% |
| MasterOnion vs Kazuya | 8–10 | 44.44% |
| MasterOnion vs Law | 5–10 | 33.33% |
| MasterOnion vs Steve | 4–11 | 26.67% |
| MasterOnion vs Jun | 8–6 | 57.14% |
| MasterOnion vs Jin | 11–2 | 84.62% |
| MasterOnion vs Lili | 7–5 | 58.33% |
| MasterOnion vs Hwoarang | 5–6 | 45.45% |
| MasterOnion vs Dragunov | 6–5 | 54.55% |
| MasterOnion vs Lidia | 5–5 | 50.00% |
| MasterOnion vs Azucena | 2–6 | 25.00% |
| MasterOnion vs Heihachi | 3–5 | 37.50% |
| MasterOnion vs Lars | 3–4 | 42.86% |
| MasterOnion vs Bryan | 2–3 | 40.00% |
| MasterOnion vs Leo | 3–2 | 60.00% |
| MasterOnion vs Victor | 4–1 | 80.00% |
| MasterOnion vs Eddy | 3–2 | 60.00% |
| MasterOnion vs Alisa | 2–2 | 50.00% |
| MasterOnion vs Nina | 4–0 | 100.00% |
| MasterOnion vs Leroy | 3–1 | 75.00% |
| MasterOnion vs Paul | 1–2 | 33.33% |
| MasterOnion vs Xiaoyu | 1–2 | 33.33% |
| MasterOnion vs Asuka | 1–2 | 33.33% |
| MasterOnion vs Zafina | 0–3 | 0.00% |
| MasterOnion vs Yoshimitsu | 1–1 | 50.00% |
| MasterOnion vs Jack-8 | 0–2 | 0.00% |
| MasterOnion vs Shaheen | 0–2 | 0.00% |
| MasterOnion vs Lee | 0–2 | 0.00% |
| MasterOnion vs Raven | 0–2 | 0.00% |
| MasterOnion vs Devil Jin | 0–1 | 0.00% |
| MasterOnion vs Kuma | 1–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.